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Calculate ?S° for the Dissolution of BaCl2 in Water at 25°C

Question 20

Multiple Choice

Calculate ?S° for the dissolution of BaCl2 in water at 25°C. BaCl2(s) ? Ba2+(aq) + 2Cl?(aq)
 Substance ΔGf(kJ/mol) ΔHf0( kJ/mol) BaCl2(s) 810.4858.6Ba2+(aq) 560.8537.6Cl(aq) 131.2167.2\begin{array}{lll}\text { Substance } & \Delta G_{\mathrm{f}}^{\circ}(\mathrm{kJ} / \mathrm{mol}) & \Delta H_{\mathrm{f}}^{0}(\mathrm{~kJ} / \mathrm{mol}) \\\hline \mathrm{BaCl}_{2}(s) & -810.4 & -858.6 \\\mathrm{Ba}^{2+}(a q) & -560.8 & -537.6 \\\mathrm{Cl}-(a q) & -131.2 & -167.2\end{array}


A) ?0.20 kJ/K
B) ?0.14 kJ/K
C) ?0.0020 kJ/K
D) +0.12 kJ/K
E) +0.29 kJ/K

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